Managing behaviours
Safety focused organisations tend to have a strong culture of operations integrity – this means supporting individuals when they make correct safety decisions that can be unpopular because they may cause delays, or cost overruns, or worse.
People do not set out to make mistakes or make bad decisions, however during project related activities people do get into situations where time and financial pressures – or trying to recover from previous bad decisions – can create a pressured environment that facilitates further bad decisions.
Our work has shown that a poor initial decision to choose a site for a new refuelling facility that is the wrong shape or too small, for instance, can put pressure on designers to solve issues that should not need to be solved. This can cause compromises to be implemented that do not align with best practice.
The site footprint of a diesel refuelling station is relatively small due to diesel being stored underground. A typical diesel HGV fuelling station can deliver approximately 1.2 MW of useful power from each refuelling bay. Currently, electric chargers deliver approximately 250 KW, so about five bays are required to deliver a similar amount of power. In addition, significant space may also be required for sub-stations, local renewable power generation, and battery storage systems to smooth power demand from the grid.
Hydrogen refuelling stations can deliver a similar power to a diesel refuelling bay. However, for various reasons, hydrogen must be stored above ground. This significantly increases the size of a site required.
Public refuelling sites for diesel HGVs are drive-in, drive-out and this best practice should be carried through wherever possible. However, this seems difficult to achieve in practice for some electric charging sites. Designers should consider staggering charging bays so that adjacent vehicle batteries are not too close to each other.
Designers also need to consider changes in behaviour of vehicle operators, for example allowing space for welfare facilities since vehicles will be stationary for longer periods. Space should also be provided for emergency services to respond to an on-site incident, for example, access to cool a vehicle battery fire or to segregate a vehicle away from other sources of energy.
Despite the new challenges presented by battery electric charging, and hydrogen refuelling infrastructure for HGVs, lessons can be learned from existing fuelling stations to ensure safe deployment. These zero emission technologies are not novel, and competency has been developed over recent decades from various adjacent industries.
It is essential that we continue to support and fund the necessary forums for best practice to be developed.
To see how Connected Places Catapult is supporting the transition, click here.
Brian Macey is an Affiliate with Connected Places Catapult.